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Mining and the Environment
Published in M. Sengupta, Environmental Impacts of Mining, 2018
Unless the pit is self-draining, water will be pumped from the pit. If the quality of the pit water is acceptable, the water may be discharged directly onto undisturbed or reclaimed land. More typically, however, pit water is discharged into a diversion ditch, the outlet of which is at or near a sediment basin or basins. Alternately, the pit discharge may be piped all the way to the sediment basin from the pit via plastic tubing.
Artificial crown pillar construction and in-pit tailings disposal at the Pinos Altos Mining Complex, Mexico
Published in CIM Journal, 2023
V. Falmagne, J. L. Carvalho, J. Cordova Montaño, M. R. Julien
As of the end of 2021, the crown pillar stopes have been mined successfully, and ore recovery has exceeded the plan. Two stopes remain to be extracted at the east end, and resources were added to the mine plan. The in-pit water management arrangement did not perform according to plan; however, the operation has successfully managed both the surface water in the TSF and infiltration underground. The placement of the impermeable layers within the trench and along the Santo Niño fault in the HW has been effective at maintaining the stability of the crown pillar stope HW. Instrumentation in place within the pit since 2015 has provided valuable insights into the RCC compaction under load, reaction of the RCC to underground development and stope mining, and water accumulation in the pit bottom during rain events. The risk assessment session held early in the project was a very useful tool for improving the design and engaging members of all mine departments.
Development of a UAV-mounted system for remotely collecting mine water samples
Published in International Journal of Mining, Reclamation and Environment, 2020
Bikram Pratap Banerjee, Simit Raval, Thomas J Maslin, Wendy Timms
The UAV-IEPS provides a platform for the future of water quality monitoring and management on a mine site, particularly of TSFs. Using UAVs to collect water quality data sets is useful for the management of mine water in tailings. The system could be used to generate other kinds of surface water quality data sets, using appropriate water quality testing devices. The technology can benefit the mining industry and could provide new data for areas that were previously inaccessible such as pit water, water in abandoned mine sites and acid mine drainage. Use of remotely operated technology can also improve safety standards by increasing the frequency of monitoring, minimising the physical interaction of hazardous substances, and eliminating the risks associated with sampling in a hazardous environment.
Engineering and enviro-management value of radius of influence estimate from mining excavation
Published in Journal of Applied Water Engineering and Research, 2018
Proper management is particularly important from the aspect of environmental concerns (Azrag et al. 1998; Jembere & Yihdego 2016; Rupp et al. 2009; Yihdego 2010; Yihdego & Webb 2012; Yihdego et al. 2016; Yihdego & Webb 2017) as well as its impact on dewatering of open pits. Extending the life of existing mines is causing the need for open pits to be deeper. A critical component in determining post-mining pit water quality is predicting groundwater inflows into the pit over time. In areas where large-scale groundwater abstraction activities such as those associated with quarry operations persist, a thorough understanding of the complexity of the system is required to ensure the sustainable development of the mining and to minimize long-term impacts. In order to design an effective drainage/dewatering scheme for an open-pit mine, prediction of radius of influence is important.